[vreg] move base registry implementation to logilab.common. Closes #1916014 A new logilab.common.registry module has been created with content from * cw.vreg (the whole things that was in there) * cw.appobject (base selectors and all). In the process, we've done some renaming: * former selector functions are now known as "predicate", though you still use predicates to build an object'selector * hence `objectify_selector` decorator is now `objectify_predicate` * the top level registry is now `RegistryStore` (was `VRegistry`) Also there is no more need for the @lltrace decorator. On the CubicWeb side, the `selectors` module has been renamed to `predicates`. There should be full backward compat with proper deprecation warnings.

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The personal information describing a User can be modified using the edit form

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of the user. You can access it through the dropdown-menu under the link on the

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top-right of the window, labeled by your login. In this menu, click the

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"profile" link to go to this form.

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Each user can as well customize the site appearance using the "user's

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preferences" link in this menu. This will show you a form to configure which

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boxes are displayed, in which order, etc...

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.. image:: doc/images/userprefs